CN113445922B

CN113445922B - Foundation pile hole expands aperture device

Info

Publication number: CN113445922B
Application number: CN202111022182.9A
Authority: CN
Inventors: 黄志翔
Original assignee: Jiangsu Jingxiang Building Material Technology Co ltd
Current assignee: Jiangsu Jingxiang Building Material Technology Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2021-11-02
Anticipated expiration: 2041-09-01
Also published as: CN113445922A

Abstract

The invention discloses a foundation pile hole diameter enlarging device which comprises a hollow upright post, a positioning assembly, a lifting assembly and a hole enlarging assembly, wherein the positioning assembly is installed on a foundation, the hollow upright post penetrates through the positioning assembly, a plurality of pile holes are vertically formed in the foundation, a supporting assembly is installed at the bottom of the hollow upright post, the supporting assembly is installed at the bottom of each pile hole, the lifting assembly is arranged on the hollow upright post, the hole enlarging assembly is installed below the lifting assembly through a transmission assembly, the lifting assembly drives the rotary hole enlarging assembly to realize that the hole enlarging assembly can uniformly cut soil on the inner wall of each pile hole while lifting in the pile hole, the hole diameter enlarging operation is carried out on the hole diameter of each pile hole while the shape of the inner wall of each pile hole is not influenced, and the hole diameter can be enlarged by avoiding secondary punching.

Description

Foundation pile hole expands aperture device

Technical Field

The invention relates to the technical field of building construction, in particular to a hole diameter expanding device for a foundation pile.

Background

From the point of view of field construction, the foundation can be divided into natural foundation and artificial foundation. The foundation is the bearing rock-soil bearing layer under the foundation. The natural foundation can meet the requirement of bearing all loads of the foundation in a natural state, a natural soil layer reinforced by people is not needed, the engineering cost is saved, and the foundation does not need manual treatment. The natural foundation is a natural soil layer which can be directly laid without treating the foundation. When the geological condition of the soil layer is better and the bearing capacity is stronger, a natural foundation can be adopted; under the condition of poor geological conditions, such as slope, sand or silt geology, or even though soil layer texture is good, when the upper load is too large, in order to ensure that the foundation has enough bearing capacity, the foundation is manually reinforced, in order to ensure the stability and structural strength of a building, pile holes need to be dug on the foundation for embedding piles, but the size of the pile holes sometimes does not accord with the diameter of pile rods, and the pile holes need to be enlarged.

The expansion to the stake hole among the prior art often needs to carry out the secondary and excavates, and it is very low to waste time and energy efficiency, and artifical excavation can destroy the shape of stake downthehole wall, can influence the laminating of stake hole and stake pole, can make stake pole and stake hole take place the skew.

Disclosure of Invention

The invention aims to provide a foundation pile hole expanding device to solve the problems in the background technology.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The embodiment of the invention discloses a foundation pile hole reaming device which comprises a hollow upright post, a positioning assembly, a lifting assembly and a reaming assembly, wherein the positioning assembly is installed on a foundation, the hollow upright post penetrates through the positioning assembly, a plurality of pile hole groups are vertically arranged on the foundation, a supporting assembly is installed at the bottom of the hollow upright post and installed at the bottom of a pile hole, the lifting assembly is arranged on the hollow upright post, and the reaming assembly is installed below the lifting assembly through a transmission assembly.

Preferably, the lifting assembly comprises a box body, a transmission gear and a first motor, a second cylindrical sleeve is installed in the box body, the upper end face and the lower end face of the second cylindrical sleeve are perpendicular to each other, a guide groove is formed in the hollow upright post, a strip-shaped plate is arranged on the inner side of the second cylindrical sleeve, the hollow upright post is in sliding fit with the second cylindrical sleeve, the strip-shaped plate is in sliding fit with the guide groove, an open groove is formed in one side of the second cylindrical sleeve, a rotating shaft is rotatably installed in the box body, the transmission gear is fixedly installed on the rotating shaft, an installation groove is vertically formed in the hollow upright post, a rack plate is fixedly installed in the installation groove, the transmission gear penetrates through the open groove and is in transmission fit with the rack plate, a driven belt pulley is fixedly installed on the rotating shaft, a first motor is fixedly installed in the box body, a driving belt pulley is installed at the output end of the first motor, and is in transmission fit with the driven belt pulley, and a transmission assembly is arranged on the outer side of the strip-shaped plate.

Preferably, transmission assembly includes thrust plate, sleeve pipe and second motor, the thrust plate is installed in the outside of bar shaped plate, and the thrust plate is parallel with the bottom surface of box, and footstep bearing is installed to the bottom of thrust plate, and the sleeve pipe is installed to footstep bearing's bottom, and driven gear is installed in the sheathed tube outside, the second motor is installed to the bottom of box, and drive gear is installed to the output of second motor, and drive gear and driven gear transmission cooperate, and reaming subassembly is installed to sheathed tube bottom, be provided with between box and the reaming subassembly and stabilize the subassembly.

Preferably, the thrust bearing comprises an inner ring, an outer ring and a rolling component, the inner ring is connected with the sleeve, the outer ring is arranged at the bottom of the thrust plate, and the rolling component is arranged between the inner ring and the outer ring.

Preferably, the reaming subassembly includes installation disc, mounting panel and first scraper blade, be provided with in the installation disc with the endocentric round hole of installation disc, round hole normal running fit has hollow column, and the installation disc is installed in sheathed tube bottom, and circumference is provided with a plurality of groups mounting hole on the installation disc, runs through between the mounting hole on mounting panel and the installation disc and is provided with a pair of anti-shear high strength bolt, and the nut is installed in anti-shear high strength bolt's bottom screw thread rotation, is provided with flexible gasket between mounting panel and the installation disc, keep away from one side of hollow column on the mounting panel and install first scraper blade, first scraper blade is the slope and installs downwards, is connected with the set-square between first scraper blade and the mounting panel.

Preferably, the mounting plate is provided with a plurality of groups of positioning holes, and anti-shearing high-strength bolts penetrate through the positioning holes.

Preferably, a second scraper is installed on one side, far away from the hollow upright column, of the first scraper, and the second scraper is perpendicular to the first scraper.

Preferably, the stabilizing component comprises a first circular ring, a second circular ring and a rigid ball, the first circular ring is installed at the bottom of the box body, the second circular ring is installed on the installation disc, the axle centers of the first circular ring and the second circular ring coincide with the axle center of the installation disc, the bottom of the first circular ring is provided with an annular groove, the rigid ball is embedded into the second circular ring, the second circular ring is in running fit with the annular groove, and the rigid ball is in sliding fit with the groove bottom surface of the annular groove.

Preferably, locating component includes first locating plate, stop collar and spacer pin, install stop collar on the first locating plate, run through being provided with hollow stand in the stop collar, the last screw thread of stop collar rotates and installs holding screw, the bottom of first locating plate is rotated and is installed a plurality of groups second connecting rod, and the second locating plate is installed to the bottom of second connecting rod, runs through on the second locating plate and is provided with the spacer pin, and first locating plate is parallel to each other with supporting component.

Preferably, the supporting component comprises a bottom plate, a supporting plate, a positioning rod and a spring, the bottom of the hollow upright post is provided with the bottom plate, the bottom of the bottom plate is provided with a first cylindrical sleeve, a plurality of groups of through grooves are circumferentially arranged on the first cylindrical sleeve, the through grooves are perpendicular to the through grooves, the support plate is parallel to the bottom plate, a sliding rod is fixedly arranged on the support plate and is in sliding fit with the first cylindrical sleeve, a spring is arranged between the top of the sliding rod and the bottom of the bottom plate and is positioned at the inner side of the first cylindrical sleeve, a plurality of groups of first connecting blocks are circumferentially arranged on the sliding rod and are in sliding fit with the through grooves, the bottom circumference of bottom plate is provided with a plurality of groups of guide sleeve, and guide sleeve sliding fit has the locating lever, and the locating lever is close to first telescopic one side of cylinder and installs the second connecting block, and first connecting block passes through the head rod rotation with the second connecting block and is connected.

Preferably, one side of the positioning rod away from the first cylindrical sleeve is a tip.

Preferably, the hollow upright post is arranged at the top of the bottom plate, a liquid guide pipe is arranged in the hollow upright post through a limiting snap ring, a plurality of groups of through holes are formed in the bottom of the hollow upright post, and one end, close to the bottom plate, of the liquid guide pipe extends out of the through holes and is communicated with the bottom of the pile hole.

Preferably, the top of the liquid guide pipe is connected with a water suction pump, and the open end of the top of the hollow upright post is connected with a water inlet pipe.

Compared with the prior art, drive rotatory reaming subassembly through lifting unit, can realize that the reaming subassembly evenly amputates the earth of stake downthehole wall when going up and down in the stake hole, carry out reaming footpath operation to the aperture in stake hole when not influencing the inner wall shape in stake hole, avoid the secondary to punch alright realization aperture's expansion.

Drawings

Fig. 1 is a schematic view of a hole enlarging device for a foundation pile according to the present invention.

FIG. 2 is a schematic cross-sectional view of a hollow column in the hole enlarging device for a foundation pile of the present invention.

Fig. 3 is a schematic view of an area a in the foundation pile hole reaming device of the invention.

Fig. 4 is a schematic view of a lifting assembly in the foundation pile hole reaming device of the invention.

Fig. 5 is a schematic diagram of the first scraper and the second scraper in the foundation pile hole reaming device.

Reference numerals:

1-foundation, 11-pile hole, 2-hollow upright post, 21-guide groove, 22-liquid guide pipe, 23-limit snap ring, 24-mounting groove, 25-rack plate, 26-through hole, 3-support component, 31-bottom plate, 32-support plate, 33-first cylindrical sleeve, 34-through groove, 35-sliding rod, 36-guide sleeve, 37-positioning rod, 38-first connecting rod, 39-spring, 4-positioning component, 41-first positioning plate, 42-limit sleeve, 43-set screw, 44-second positioning plate, 45-second connecting rod, 46-limit pin, 5-lifting component, 51-box body, 52-second cylindrical sleeve, 53-strip plate, 54-open groove, 55-drive gear, 56-driven pulley, 57-first motor, 58-drive pulley, 59-drive belt, 6-reaming assembly, 61-mounting disc, 62-mounting plate, 63-flexible gasket, 64-shear resistant high strength bolt, 65-nut, 66-first scraper, 67-second scraper, 68-triangle, 7-drive assembly, 71-thrust plate, 72-thrust bearing, 73-sleeve, 74-second motor, 75-drive gear, 76-driven gear, 77-first ring, 78-second ring, 79-rigid ball.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in figure 1, a foundation pile hole reaming diameter device comprises a hollow upright post 2, a positioning component 4, a lifting component 5 and a reaming component 6, wherein the positioning component 4 is installed on a foundation 1, the hollow upright post 2 penetrates through the positioning component 4, a plurality of pile holes 11 are vertically arranged on the foundation 1, a supporting component 3 is installed at the bottom of the hollow upright post 2, the supporting component 3 is installed at the bottom of the pile hole 11, the hollow upright post 2 can be ensured to be stably positioned in the pile hole 11 through the limitation of the supporting component 3 and the positioning component 4 on the hollow upright post 2, so that the hollow upright post 2 is positioned in the center of the pile hole 11, the lifting component 5 is arranged on the hollow upright post 2, the lifting component 5 can ascend and descend on the hollow upright post 2, the reaming component 6 is installed below the lifting component 5 through a transmission component 7, and redundant silt on the inner wall of the pile hole 11 can be cut through the rotation of the reaming component 6, the lifting assembly 5 drives the reaming assembly 6 to move up and down on the hollow upright post 2, and the pile hole 11 can be subjected to hole diameter expansion operation from top to bottom.

The positioning assembly 4 comprises a first positioning plate 41, a limiting sleeve 42 and a limiting pin 46, the limiting sleeve 42 is installed on the first positioning plate 41, the hollow upright post 2 penetrates through the limiting sleeve 42, a set screw 43 is installed on the limiting sleeve 42 in a rotating mode through threads, the sliding of the hollow upright post 2 in the limiting sleeve 42 can be limited by rotating the set screw 43, a plurality of groups of second connecting rods 45 are installed at the bottom of the first positioning plate 41 in a rotating mode, a second positioning plate 44 is installed at the bottom of each second connecting rod 45, the limiting pin 46 is arranged on each second positioning plate 44 in a penetrating mode, the limiting pin 46 is inserted into the corresponding positioning plate 1 and can limit the position of the first positioning plate 41, the first positioning plate 41 is parallel to the supporting assembly 3, and the limiting on the position of the hollow upright post 2 can be achieved.

As shown in fig. 1 and 3, the supporting assembly 3 includes a bottom plate 31, a supporting plate 32, a positioning rod 37 and a spring 39, the bottom plate 31 is installed at the bottom of the hollow column 2, a first cylindrical sleeve 33 is installed at the bottom of the bottom plate 31, a plurality of sets of through grooves 34 are circumferentially arranged on the first cylindrical sleeve 33, the through grooves 34 are perpendicular to the through grooves 34, the supporting plate 32 is parallel to the bottom plate 31, the supporting plate 32 is placed in the pile hole 11 to prevent the hollow column 2 from sinking downward in the pile hole 11, a sliding rod 35 is fixedly installed on the supporting plate 32, the sliding rod 35 is in sliding fit with the first cylindrical sleeve 33, the spring 39 is arranged between the top of the sliding rod 35 and the bottom of the bottom plate 31, the spring 39 is located inside the first cylindrical sleeve 33, a plurality of first connecting blocks are circumferentially arranged on the sliding rod 35, the first connecting blocks are in sliding fit with the through grooves 34, a plurality of guide sleeves 36 are circumferentially arranged at the bottom of the bottom plate 31, a positioning rod 37 is matched in the guide sleeve 36 in a sliding way, a second connecting block is arranged on one side of the positioning rod 37 close to the first cylindrical sleeve 33, the first connecting block and the second connecting block are connected through a first connecting rod 38 in a rotating way, when the sliding rod 35 drives the first connecting block to vertically slide up and down, the positioning rod 37 can slide left and right in the guide sleeve 36, when the supporting plate 32 is placed in the pile hole 11, the sliding rod 35 slides in the first cylindrical sleeve 33 in the direction close to the bottom plate 31 under the self weight of the hollow upright post 2 and the lifting assembly 5, the sliding rod 35 drives the first connecting block to slide upwards in the through groove 34, the positioning rod 37 is pushed out in the direction far away from the first cylindrical sleeve 33 under the connecting action of the first connecting rod 38, the positioning rod 37 is inserted into the pile hole 11, the limitation of the position of the bottom end of the hollow upright post 2 in the pile hole 11 is realized, and the hollow upright post 2 is pulled out upwards after the diameter expanding operation is completed, under the elastic force effect of spring 39, slide bar 35 drives first link block and slides downwards in running through groove 34, realizes withdrawing the locating lever 37 who inserts in stake hole 11, makes things convenient for the dismouting when conveniently fixing the bottom of hollow stand 2.

One side of the positioning rod 37, which is far away from the first cylindrical sleeve 33, is a tip, so that the resistance between the positioning rod 37 and the soil can be reduced when the positioning rod 37 is inserted into the pile hole 11, and the positioning rod 37 is ensured to be inserted into the pile hole 11, thereby realizing the bottom end fixation of the hollow upright post 2.

As shown in fig. 2 and 3, hollow column 2 is installed at the top of bottom plate 31, install catheter 22 through spacing snap ring 23 in hollow column 2, the bottom of hollow column 2 is provided with a plurality of groups of through-holes 26, the bottom intercommunication of through-hole 26 and stake hole 11 is stretched out to the one end that catheter 22 is close to bottom plate 31, can take out the mud of stake hole 11 bottom through stake hole 11, through adding water and flowing into in stake hole 11 through-hole 26 in hollow column 2, water mixes into mud with broken earth, cooperation catheter 22 conveniently discharges outside stake hole 11 with broken earth.

The top and the suction pump of catheter 22 are connected, the open-top end and the inlet tube connection of hollow stand 2, can be to water injection in the hollow stand 2, rivers flow into in stake hole 11 from the bottom through-hole 26 of hollow stand 2, the suction pump can mix leading-in water of the earth of bottom in stake hole 11 and the mud that forms is taken out, make stake hole 11 behind the enlarged aperture keep clean, the cutting earth that falls carries out the degree of depth that the bottom was filled to stake hole 11 and leads to stake hole 11 reduces, can not reduce the degree of depth in stake hole when taking out mud through catheter 22 and can making the aperture enlarge.

As shown in fig. 1, 2 and 4, the lifting assembly 5 includes a box body 51, a transmission gear 55 and a first motor 57, the box body 51 is internally provided with a second cylindrical sleeve 52, the second cylindrical sleeve 52 is perpendicular to the upper and lower end faces of the box body 51, the hollow column 2 is provided with a guide slot 21, the inner side of the second cylindrical sleeve 52 is provided with a strip-shaped plate 53, the hollow column 2 is in sliding fit with the second cylindrical sleeve 52, the strip-shaped plate 53 is provided with a guide slot 21 in sliding fit, so that the box body 51 and the second cylindrical sleeve 52 do not rotate relative to the hollow column 2 when sliding in the vertical direction, one side of the second cylindrical sleeve 52 is provided with an open slot 54, the box body 51 is rotatably provided with a rotating shaft, the transmission gear 55 is fixedly mounted on the rotating shaft, the hollow column 2 is vertically provided with a mounting slot 24, a rack plate 25 is fixedly mounted in the mounting slot 24, the transmission gear 55 passes through the open slot 54 and is in transmission fit with the rack plate 25, fixed mounting has driven pulley 56 in the axis of rotation, fixed mounting has first motor 57 in the box 51, driving pulley 58 is installed to the output of first motor 57, cooperate through the transmission of drive belt 59 between driving pulley 58 and the driven pulley 56, drive gear 55 and rack plate 25 transmission cooperation under the drive of first motor 57, can drive lifting unit 5 and reaming subassembly 6 and move on the vertical direction, can realize the hole enlargement operation to darker stake hole, drive assembly 7 is installed in the outside of bar shaped plate 53, through the synergism of lifting unit 5 and drive assembly 7, can drive reaming subassembly 6 and rotate when reciprocating in stake hole 11 and carry out earth excision operation.

The transmission assembly 7 comprises a thrust plate 71, a sleeve 73 and a second motor 74, the thrust plate 71 is mounted on the outer side of the strip-shaped plate 53, the thrust plate 71 is parallel to the bottom surface of the box body 51, a thrust bearing 72 is mounted at the bottom of the thrust plate 71, the sleeve 73 is mounted at the bottom of the thrust bearing 72, a driven gear 76 is mounted on the outer side of the sleeve 73, the second motor 74 is mounted at the bottom of the box body 51, a driving gear 75 is mounted at the output end of the second motor 74, the driving gear 75 is in transmission fit with the driven gear 76, the reaming assembly 6 is mounted at the bottom of the sleeve 73, the sleeve 73 and the reaming assembly 6 can be driven by the second motor 74 to rotate around the hollow upright column 2, the reaming assembly 6 can be driven to cut off the inner wall of the pile hole 11, a stabilizing assembly is arranged between the box body 51 and the reaming assembly 6, and the stabilizing assembly can enable the reaming assembly 6 not to deflect when receiving large resistance, ensuring that the reaming assembly 6 cuts the inner wall of the pile hole 11 to the same thickness.

The thrust bearing 72 includes an inner ring, an outer ring and a rolling member, the inner ring is connected to the sleeve 73, the outer ring is mounted at the bottom of the thrust plate 71, and the rolling member is provided between the inner ring and the outer ring, so that the sleeve 73 can rotate around the hollow column 2.

The reaming assembly 6 comprises a mounting disc 61, a mounting plate 62 and a first scraper 66, wherein a round hole concentric with the mounting disc 61 is arranged in the mounting disc 61, a hollow upright column 2 is arranged in the round hole in a rotating fit mode, the mounting disc 61 is arranged at the bottom of a sleeve 73, a plurality of groups of mounting holes are circumferentially arranged on the mounting disc 61, a pair of anti-shearing high-strength bolts 64 penetrates through the mounting holes in the mounting plate 62 and the mounting disc 61, nuts 65 are rotatably arranged at the bottoms of the anti-shearing high-strength bolts 64, a flexible gasket 63 is arranged between the mounting plate 62 and the mounting disc 61, the flexible gasket 63 can reduce part looseness caused by friction between the mounting plate 62 and the mounting disc 61 in the process of soil removal, the first scraper 66 is arranged on one side, far away from the hollow upright column 2, of the mounting plate 62, the first scraper 66 is obliquely downwards arranged, and a triangular plate 68 is connected between the first scraper 66 and the mounting plate 62, the strength of the connection between the first squeegee 66 and the mounting plate 62 can be ensured.

The mounting plate 62 is provided with a plurality of groups of positioning holes, the anti-shearing high-strength bolts 64 are arranged in the positioning holes in a penetrating mode, the positioning holes in different positions are combined with the anti-shearing high-strength bolts 64, the extension lengths of the mounting plate 62 and the first scraper 66 can be adjusted, the inner diameter of the pile hole 11 can be adjusted in a large range, and when different pile holes are expanded, the cutting range of the reaming component 6 can be adjusted only by adjusting the matching of the positioning holes and the anti-shearing high-strength bolts 64.

The stabilizing component comprises a first circular ring 77, a second circular ring 78 and rigid balls 79, the first circular ring 77 is installed at the bottom of the box body 51, the second circular ring 78 is installed on the installation disc 61, the axle centers of the first circular ring 77 and the second circular ring 78 are coincided with the axle center of the installation disc 61, the bottom of the first circular ring 77 is provided with an annular groove, the rigid balls 79 are embedded in the second circular ring 78, the second circular ring 78 is in running fit with the annular groove, the rigid balls 79 are in sliding fit with the groove bottom surface of the annular groove, and the friction resistance between the first circular ring 77 and the second circular ring 78 can be reduced while the installation disc 61 is ensured to rotate stably.

As shown in fig. 4 and 5, a second scraper 67 is installed on one side of the first scraper 66 far away from the hollow upright 2, the second scraper 67 is perpendicular to the first scraper 66, so that the efficiency of cutting soil in the pile hole 11 can be increased, the cut soil falls at the bottom of the pile hole 11 under the action of gravity and the stirring of the first scraper 66, and the cut soil is combined with water flow to be pumped out of the pile hole 11.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The foundation pile hole reaming device comprises a hollow upright post (2), a positioning component (4), a lifting component (5) and a reaming component (6), and is characterized in that the positioning component (4) is installed on a foundation (1), the hollow upright post (2) penetrates through the positioning component (4), a plurality of groups of pile holes (11) are vertically arranged on the foundation (1), a supporting component (3) is installed at the bottom of the hollow upright post (2), the supporting component (3) is installed at the bottom of the pile hole (11), the lifting component (5) is arranged on the hollow upright post (2), and the reaming component (6) is installed below the lifting component (5) through a transmission component (7); lifting unit (5) includes box (51), drive gear (55) and first motor (57), install second cylinder sleeve (52) in box (51), both ends face mutually perpendicular about second cylinder sleeve (52) and box (51), be provided with guide way (21) on hollow stand (2), second cylinder sleeve (52) inboard is provided with strip shaped plate (53), hollow stand (2) and second cylinder sleeve (52) sliding fit, strip shaped plate (53) have guide way (21) sliding fit, one side of second cylinder sleeve (52) is provided with open slot (54), the axis of rotation is installed in the box (51) internal rotation, fixed mounting has drive gear (55) in the axis of rotation, vertical mounting groove (24) that are provided with on hollow stand (2), fixed mounting has rack plate (25) in mounting groove (24), drive gear (55) pass open slot (54) and with rack plate (25) transmission fit, the driven belt wheel (56) is fixedly mounted on the rotating shaft, the first motor (57) is fixedly mounted in the box body (51), the driving belt wheel (58) is mounted at the output end of the first motor (57), the driving belt wheel (58) is in transmission fit with the driven belt wheel (56) through a transmission belt (59), and the transmission assembly (7) is mounted on the outer side of the strip-shaped plate (53).

2. The foundation pile hole reaming device according to claim 1, wherein the transmission assembly (7) comprises a thrust plate (71), a sleeve (73) and a second motor (74), the thrust plate (71) is arranged on the outer side of the strip-shaped plate (53), the thrust plate (71) is parallel to the bottom surface of the box body (51), the bottom of the thrust plate (71) is provided with a thrust bearing (72), the bottom of the thrust bearing (72) is provided with a sleeve (73), the outer side of the sleeve (73) is provided with a driven gear (76), a second motor (74) is installed at the bottom of the box body (51), a driving gear (75) is installed at the output end of the second motor (74), the driving gear (75) is in transmission fit with the driven gear (76), a hole expanding component (6) is installed at the bottom of the sleeve (73), and a stabilizing assembly is arranged between the box body (51) and the reaming assembly (6).

3. The foundation pile hole reaming device according to claim 2, wherein the reaming assembly (6) comprises a mounting disc (61), a mounting plate (62) and a first scraper (66), a round hole concentric with the mounting disc (61) is formed in the mounting disc (61), the hollow upright (2) is rotationally matched in the round hole, the mounting disc (61) is mounted at the bottom of the sleeve (73), a plurality of groups of mounting holes are circumferentially formed in the mounting disc (61), a pair of anti-shearing high-strength bolts (64) penetrate through the mounting holes in the mounting plate (62) and the mounting disc (61), nuts (65) are rotationally mounted at the bottoms of the anti-shearing high-strength bolts (64) in a threaded manner, flexible gaskets (63) are arranged between the mounting plate (62) and the mounting disc (61), and the first scraper (66) is mounted on one side, far away from the hollow upright (2), of the mounting plate (62), the first scraper (66) is obliquely and downwards arranged, and a triangular plate (68) is connected between the first scraper (66) and the mounting plate (62).

4. The foundation pile hole reaming device according to claim 3, characterized in that a second scraper (67) is installed on the side of the first scraper (66) far away from the hollow column (2), and the second scraper (67) is perpendicular to the first scraper (66).

5. The foundation pile hole reaming device according to claim 4, wherein the stabilizing component comprises a first circular ring (77), a second circular ring (78) and rigid balls (79), the first circular ring (77) is installed at the bottom of the box body (51), the second circular ring (78) is installed on the installation disc (61), the axial centers of the first circular ring (77) and the second circular ring (78) are coincident with the axial center of the installation disc (61), the bottom of the first circular ring (77) is provided with an annular groove, the second circular ring (78) is embedded with the rigid balls (79), the second circular ring (78) is in rotating fit with the annular groove, and the rigid balls (79) are in sliding fit with the groove bottom surface of the annular groove.

6. The foundation pile hole reaming device according to claim 5, wherein the positioning assembly (4) comprises a first positioning plate (41), a limiting sleeve (42) and a limiting pin (46), the limiting sleeve (42) is installed on the first positioning plate (41), the hollow upright column (2) penetrates through the limiting sleeve (42), a set screw (43) is installed on the limiting sleeve (42) in a rotating mode through threads, a plurality of groups of second connecting rods (45) are installed on the bottom of the first positioning plate (41) in a rotating mode, a second positioning plate (44) is installed at the bottom of each second connecting rod (45), the limiting pin (46) penetrates through the second positioning plate (44), and the first positioning plate (41) and the supporting assembly (3) are parallel to each other.

7. The foundation pile hole reaming device according to claim 6, wherein the supporting assembly (3) comprises a bottom plate (31), a supporting plate (32), a positioning rod (37) and a spring (39), the bottom plate (31) is installed at the bottom of the hollow upright column (2), a first cylindrical sleeve (33) is installed at the bottom of the bottom plate (31), a plurality of groups of through grooves (34) are circumferentially arranged on the first cylindrical sleeve (33), the through grooves (34) are perpendicular to the bottom plate (31), the supporting plate (32) is parallel to the bottom plate (31), a sliding rod (35) is fixedly installed on the supporting plate (32), the sliding rod (35) is in sliding fit with the first cylindrical sleeve (33), the spring (39) is arranged between the top of the sliding rod (35) and the bottom of the bottom plate (31), the spring (39) is located on the inner side of the first cylindrical sleeve (33), a plurality of groups of first connecting blocks are circumferentially arranged on the sliding rod (35), the first connecting block is in sliding fit with the through groove (34), a plurality of groups of guide sleeves (36) are arranged on the bottom of the bottom plate (31) in the circumferential direction, positioning rods (37) are in sliding fit in the guide sleeves (36), a second connecting block is installed on one side, close to the first cylindrical sleeve (33), of each positioning rod (37), and the first connecting block is rotatably connected with the second connecting block through a first connecting rod (38).

8. The ground pile hole reaming device according to claim 7, wherein the side of the positioning rod (37) away from the first cylindrical sleeve (33) is pointed.

9. The foundation pile hole reaming device according to claim 8, characterized in that the hollow upright column (2) is installed on the top of the bottom plate (31), the liquid guide pipe (22) is installed in the hollow upright column (2) through a limiting snap ring (23), the bottom of the hollow upright column (2) is provided with a plurality of groups of through holes (26), and one end of the liquid guide pipe (22) close to the bottom plate (31) extends out of the through holes (26) to be communicated with the bottom of the pile hole (11).